Ioannis John Demarakos, MD
NPI 1922622653ActiveIndividual· Thoracic Surgery (Cardiothoracic Vascular Surgery)· Seattle, WA
Thoracic Surgery (Cardiothoracic Vascular Surgery) (MD) with The Association of University Physicians, practicing in Seattle, Washington. Medicare paid $47,489 for services to 28 patients in 2024. Transmedics, Inc. was the largest of 2 companies reporting payments in 2025, $3,792 in all, mostly travel and lodging. Lists University of Washington Medical Ctr as a hospital affiliation.
Overview
| NPI | 1922622653 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 28, 2020 |
| Last updated in NPPES | Oct 6, 2022 |
| Certified by provider | Oct 6, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Thoracic Surgery (Cardiothoracic Vascular Surgery) Primary | 208G00000X | TR61290864 | WA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Thoracic Surgery (WA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 28 |
|---|---|
| Services billed | 83 across 41 procedure codes |
| Paid by Medicare | $47,489 |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Thoracic Surgery |
Medical group
- The Association of University PhysiciansSeattle, WA · 3,535 clinicians
Hospital affiliation
- University of Washington Medical CtrSeattle, WA
Industry payments (Open Payments)
- 2025$3,792 · 5 payments from 2 companies
- 2024$6,321 · 8 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Transmedics, Inc. | $3,459 | 1 |
| Abbott Laboratories | $332.86 | 4 |
What the 2025 payments were for
- Travel and Lodging$3,459 · 1 payment
- Food and Beverage$332.86 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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